Cryptographic storage service on a cloud system

In this work, we propose a secure protocol to storage data into a cloud system application. The approach we followed allows the potential of cloud computing for applications and systems, all this while maintaining full control over the properties and content of data. We developed an application to prove the efficiency of the protocol in many different scenarios on various cloud platforms like Google Appengine and on a hosting virtual server. The application that we made can store simple text message or complex data such as file into a cloud system and share it with other users or groups of users. Moreover, its applicability to store data in safety has been tested and discussed and every single function has been discussed